Engraver&#39;s tool.



No. 737,761. PATENTED SEPT. 1, 1903. E. c. MULLER.

ENGRAVERS TOOL.

APPLICATION III-ED MAR. s. 1903.

no MODEL. 2 sums-sum 1-.

INVENTOR'.

Ew-aifl Em 11115.1. a ar ATTORN EY No. 737.761. 7 PATENTE D SEPT. l,1903. E. G. MULLER.

ENGRAVERS TOOL.

APPLIUATION FILED MAR. 3 l 1903.

2 SHEETS-SHEET 2.

N0 MODEL.

WITNESSES: INVENTOR'- ATTORNEY UNTTED STATES Patented September 1, 1903.

PATENT OFFICE.

ENGRAVERS TOOL.

SPECIFICATION forming part of Letters Patent No. 737,761, datedSeptember 1, 1903.

Application filed March 3 1903.

To all], whom it may concern.-

Be it known that I, EDWARD C. MULLER, a citizen of the United States,residing at New York, in the county of New York and State ofNewYork,have invented certain new and useful Improvements in EngraversTools; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same, referencebeing had to the accompanying drawings, and to figures of referencemarked thereon, which form part of this specification.

The present invention has reference generally to a novel construction oftool to be used for engraving purposes,whether for metal-engraving orfor the engraving of printingplates of the various kinds, theengravingtool being provided with cutting edges or teeth so graduatedthat they can be made to engage the object to different depths, andthereby provide an engraved surface,whether for printing or otherwise,which shallhave a round or curved or a shaded appearance.

The principal object of my invention therefore is to provide a novelengravefis tool having an arrangement of cutters or cuttingteeth, thesaid cutters or teeth being graduated in such a manner that they willengage the object to different depths, whereby some of the lines of theengraved object or plate may be made deeper than others, all with a viewof providing a simple and inexpensive tool by'means of which such linesof varying depths can be made at one time.

The tool is especially adapted for producing shaded surfaces,eitherconcavo or convex, with the least expenditure of time and skill, forwith the ordinary en graving-tool now employed the greatest care andskill are necessary, and hence the employment of skilled and expensiveworkmen are at the present time required on this class of work.

The invention consists, therefore, in the novel form and construction ofengravers tool hereinafter described, the same being made with cuttersor teeth so graduated that with one operation the object to be engravedis engaged at different depths.

The invention is clearly illustrated in the accompanying drawings, inwhich-- Serial No. 145,927. (No model.)

Figures 1 and 2 are a side and bottom view, respectively, of one form ofengravers tool embodying the principles of this invention,

the tool being employed for engraving con-- cavo surfaces in a plate orother object. Fig. 3 is a face view of a portion of the lower or bottomsurface of the form of engraving-tool represented in Figs. 1 and 2, andFig. 4 is an edge or end view of the cutting end of the tool, both ofsaid views being represented on an enlarged scale to clearly illustratethe graduated cutters or teeth. Figs. 5 and 6 are a side and bottomview, respectively, of another form of engravers tool embodying theprinciples of the present invention, but this tool being employed forengraving convex-surface representations in a plateor other body. Fig. 7is a face View of a portion of the lower or bottom surface of the formof engravingtool represented in Figs. 5 and 6, and Fig. 8 is an edge orend View of the cutting end of this form of tool, said two views alsobeing made on an enlarged scale to clearly illustrate their form ofgraduated cutters or teeth.

Similar characters of reference are employed in all of the saidhereinabove-described views to indicate corresponding parts.

Referring now to Figs. 1, 2, 3, and 4 of the drawings, the toolconsists, essentially, of a main body 1, having a shank 2, by means ofwhich it is attached to any suitably-shaped handle 3. This tool ispreferably of the curved configuration represented in Figs. 1 and 2, itsunder or bottom surface being provided with an arrangement oflongitudinally-extending ridges sharpened at the free end of said bodyto produce cutters 4. These cutters are more clearly represented in theenlarged detail views in Figs. 3 and 4, from which it will be seen thatby varying the pressure upon the tool while engraving lines of varyingdepths can be made during one operation in the plate or articIe to beengraved, the cutters or teeth 4 being of such graduations that theircutting edges all lie in a curved plane, forming the convex bottom ofsaid tool. Thus it will be evident from an inspection,more especially ofFig. 4, that the cutters or teeth are so graduated that with oneoperation with the tool lines of difierent depths can be made in theobject to be engraved, t-he engraved surface in that case having theappearance of a concavo cut or shading, and when used with aprinting-plate said plate producing a printing-surface, from which maybe printed a surface of a convex appearance.

In Figs. 5, 6, 7, and 8 I have illustrated a modified form of engraverstool embodying the features of this invention. In this form of tool themain body 1, the shank 2, and the handle 3 are the same as thecorresponding parts represented in connection with the construction ofengravers tool illustrated in Figs. 1 and 2 of the drawings, except thatthe bottom or under surface of the tool in this case is of the reversecurvature from that of the under surface of the tool shown in said Figs.1 and 2. In this manner the body 1 of the tool has its lower surfacemade concave, as illustrated, said surface being provided with anarrangement of cutters 5.

Referring now to Figs. 7 and 8, in which views these cutters are moreclearly represented on an enlarged scale, it will be seen that byvarying the pressure upon the tool while engraving lines of varyingdepths may be made during one operation in the plate or other article tobe engraved, the cutters or teeth 5 being of such graduations that theircutting edges all will lie directly within a curved plane forming theconcave bottom of the said tool. It will be clearly understood from aninspection of said Fig. 8 that these cutters or teeth are so graduatedthat with one operation with the tool lines of different depths may bemade in the object which is to be engraved, the engraved surface in thiscase having the appearance of a convex cut or shading and when used witha printing-plate producing a printing-surface from which may be printeda surface of concavo appearance.

From the above description of my invention it will clearly be evidentthat I have provided a simplyconstructed engraving-tool for cutting orengraving the surface of an object or printing-plate with lines varyingin depth, so as to produce curved-surface effects, and withprinting-plates an effect of shading, the various lines which are gradu=ated to different depths being made at one operation, which heretoforerequired many careful and tedious operations made by means of asingle-pointed tool. Hence the danger heretofore existing of ruining thework is reduced to a minimum and cheaper work with quick results isobtained.

Of course it will be understood that the number of cutters and thedegree and shape of curvature may be varied at will without departingfrom the scope of my present invention. Hence I do not limit myinvention to the exact arrangements and combinations of the parts asdescribed in the accompanying specification and as illustrated in theaccompanying drawings, nor do I confine myself to the exact details ofthe construction of the tool.

Having thus described my invention, what I claim is 1. A handshading-tool, comprising, a main body having a lower surface of a curvedcrosssection, a shank at one end of said body, and a handle attached tosaid shank, and a multiplicity of ridges extending longitudinally alongthe lower curved surface of said body, the free end of said body beingcut to form cutters, substantially as and for the purposes set forth.

2. A hand shading-tool, comprising,a main body having a lower surface ofa convex crosssection, a shank at one end of said body, and a handleattached to said shank, and a multiplicity of ridges extendinglongitudinally along the lower convex surface of said body, the free endof said body being cut to form cutters, substantially as and for thepurposes set forth.

In'testimony that I claim the invention set forth above I have hereuntoset my hand this 26th day of February, 1903.

EDWARD O. MULLER.

Witnesses:

FREDK. C. FBAENTZEL, GEO. D. RICHARDS.

